<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>02-css选择器</title>
    <link rel="stylesheet" href="../css/选择器.css">
</head>
<body>
    <h1 id="title">我是h1标签</h1>
    <div id="tag">我是div标签</div>

    <h1 class="tag">我是标题</h1>
    <h1 class="abc">我是标题</h1>
    <div class="tag">我是一个div标签</div>
    <p class="tag" id="title1">我是一个p标签</p>
</body>
</html>